An electronic device is provided. The electronic device includes an image sensor module for obtaining a security image or a non-security image using a first group pixel and a second group pixel and a processor including a security processing module and a non-security processing module electrically connected with the image sensor module. The processor is configured to receive a first user input, enable the security processing module, determine whether the image sensor module is enabled using the enabled security processing module, when the image sensor module is enabled, at least temporarily block reception of an image from the image sensor module, when the image sensor module is disabled, enable the image sensor module using the enabled security processing module, request the image sensor module to obtain the security image for the external object, and receive the security image for the external object, obtained from the image sensor module.